Final answer:
Gingival recession can occur when inflammation caused by periodontal diseases like gingivitis and periodontitis is resolved through NSPT because the decrease in swelling leads to gum tissue shrinkage, revealing more of the tooth structure.
Step-by-step explanation:
The resolution of inflammation during nonsurgical periodontal therapy (NSPT) may lead to gingival recession because the reduction in swelling causes the gum tissue to shrink back. During inflammation, as seen in conditions like gingivitis, the gums become swollen due to the body's immune response to bacterial invasion. If left untreated, gingivitis can progress to periodontitis, a more severe stage of periodontal disease, where swelling, bone loss, and erosion of cementum occur.
As NSPT addresses this by removing plaque and calculus, the inflammation subsides, and the swollen tissues contract, revealing more of the tooth structure. This can inadvertently result in the appearance of receding gums. This process is necessary for restoring periodontal health but can lead to increased tooth sensitivity and potential aesthetic concerns for the patient. It is critical for patients to follow good oral hygiene practices and maintain regular dental visits to manage the health of the gums and prevent further gum recession.